PDF
Full
Outline
A method for simultaneous determination of As and Hg in uranium ore by hydride generation atomic fluorescence spectrometer was established, and the effects of digestion temperature, digestion time, medium system, KBH4 concentration, and uranium content on the detection results were investigated. The results show that the optimal conditions for this method are to dissolve uranium ore with (1+1) aqua regia for 60 minutes at 125 ℃, (5+95)HCl as the medium and 2.0% KBH4 solution as the reducing agent. The detection limits of this method are 0.006 μg/g (for As) and 0.001 μg/g (for Hg), with relative standard deviations of 2.46% (for As) and 4.22% (for Hg), and recovery rates of 98%~103%(for As) and 97%~106% (for Hg). This method has high accuracy and precision, and can meet the requirements for the determination of As and Hg in uranium ore.
PDF
312
123
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
